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   PR # 11104
    We propose to observe three infrared luminous galaxies (IRL galaxies)
    at different stages of evolutionary sequence of interacting or merged
    systems. The high sensitivity of ASCA will allow the first detection
    hypothetical AGN embedded in IRL galaxies, and this observation will
    reveal relative contributions of the starburst component and of the
    embedded AGN component to the total power. Since the embedded AGN in
    IRL galaxies suffer large amount of extinction, the wide spectral
    coverage of ASCA is essential to estimate the intrinsic luminosity of
    the AGN component corrected for extinction. This observation is a
    crucial test for the proposed evolutionary sequence from (1)starburst
    dominating IRL galaxies, via (2) IRL galaxies powered by embeddedAGN,
   to (3) bare AGN or quasars.
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